A key step of accident reconstruction is to establish impact models for calculating the impact velocity of vehicles.
建立碰撞模型求解碰撞速度是交通事故再现的关键步骤。
The results show that the depth and diameter of craters change linearly with the projectile diameter when the impact velocity is a constant.
结果表明，弹丸撞击速度一定时，弹坑深度和弹坑直径均与弹丸直径呈线性关系。
Meanwhile, the same failure modes are found with the constant impact velocity.
同时，当冲击速度恒定不变时，我们也观察到了相同的失效模式。
Damage modes of 5A06 single sheet plate in different ranges of impact velocity were obtained.
实验得到了该铝合金板在不同的速度区间的损伤模式。
The experimental results show that the impact velocity is closely related with the number and area of the debris.
试验结果表明，着速与破片的数量和覆盖面积有很大关系。
The present attention is mainly focused on the effect of initial deflection, impact velocity and coupled stiffness.
分析了初始挠度、冲击速度、耦合刚度等因素对临界轴向缩短量的影响。
The pulse width and impact velocity as small as possible on the premise that can obtain reflection from the pile toe.
在能够获得桩底反射的前提下，脉冲宽度和敲击速度尽量小。
The relationship curves between impact velocity and deformation field are obtained, which can be an important base of the research for meteorite impact.
得到了撞击速度与撞击形变场的关系曲线，可作为陨石撞击研究的重要依据。
Our results prove that the severity of tissue damage resulting from fragment injury is closely related to the shape, mass and impact velocity of the fragments.
反映了组织损伤程度受弹片的形状、质量、撞击速度等的相互影响。
The formula acquired from experiment, indicated the relationship with penetration increment, oblique angle of target and impact velocity, can be applied in engineering.
所获得的相对侵彻增量与靶板倾角、着靶速度的定量关系式，具有工程应用价值。
It is found that the plateau stress is proportional to the square of the impact velocity when the imperfect honeycombs are deformed at transitional mode or dynamic mode.
对含缺陷蜂窝结构平台应力的研究发现，当变形模式为过渡模式或动态模式时结构平台应力与冲击速度的平方成线性关系。
When the radius-to-thickness ratio, constraint condition and material parameters are given, the buckling mode is from axisymmetric to unaxisymmetric as impact velocity increases.
当径厚比、约束条件、材料参数等不变时，随着冲击速度的增大，屈曲由轴对称变为非轴对称。
Based on those results, the relationship between pedestrian's head and leg injuries and car impact velocity was studied which can provide references for improving cars' pedestrian safety.
在此基础上计算得出行人头部及下肢伤害与汽车碰撞速度的变化关系，可为改善汽车的行人安全性提供参考。
Two methods to improve the impact velocity are proposed. The dynamic equation of particle motion is established. The influence parameters to the impact velocity are calculated and analyzed.
提出了两种提高冲击速度的方法，建立了颗粒运动的力学方程，计算和分析了影响冲击速度的参数。
The result shows that the impact velocity of initial yield is very small for the soil, and the cohesion has an obvious influence on it while the internal friction Angle does relatively small.
研究结果表明：土体初始屈服冲击速度非常小，其中黏聚力对其有较大影响，而内摩擦角对其影响相对较小。
With the increment of impact velocity, the new material appears positive strain rate sensitivity, but when the increment reaches a certain degree, the material shows negative strain rate sensitivity.
随着冲击速度的提高，材料具有应变率正敏感性，但到一定程度材料反而显示出应变率负敏感性。
By analyzing the properties of the foam-filled circular tube structure under different impact-velocity, the results confirm that the structure can be used as plastic displacement restrictor.
通过对填充圆管在不同冲击速率情况下的特性分析，表明其可用作塑性限位器。
By analyzing the properties of the foam-filled circular tube structure under different impact-velocity, the results confirm that the structure can be used as plastic displacement restrictor.
通过对填充圆管在不同冲击速率情况下的特性分析，表明其可用作塑性限位器。
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